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Finding the Fourth Proportional to 346.24, 520.64 and 320

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Solution

The fourth proportional to 346.24, 520.64 and 320 is: 481.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.24 : 520.64 = 320 : x
  2. Step 2: Convert to fraction form
    346.24/520.64 = 320/x
  3. Step 3: Cross multiply
    346.24x = 520.64 × 320
  4. Step 4: Simplify right side
    346.24x = 166,604.80
  5. Step 5: Solve for x
    x = 166,604.80/346.24
  6. Step 6: Final answer
    x = 481.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.